SOLUTION: A scene from an adventure film calls for a stunt dummy to be dropped from above the second-story platform of the Eiffel Tower, a distance of 400 feet. Its height h(t) at time t is

Algebra ->  Coordinate Systems and Linear Equations  -> Linear Equations and Systems Word Problems -> SOLUTION: A scene from an adventure film calls for a stunt dummy to be dropped from above the second-story platform of the Eiffel Tower, a distance of 400 feet. Its height h(t) at time t is       Log On


   

Question 800851: A scene from an adventure film calls for a stunt dummy to be dropped from above the second-story platform of the Eiffel Tower, a distance of 400 feet. Its height h(t) at time t is given by h(t)= -16t^2 + 400. Determine algebraically how long before the stunt dummy reaches the ground
I just need someone to tell me how to do it...not just give me the answer
Answer by mananth(16946) About Me  (Show Source):
You can put this solution on YOUR website!
height h(t) at time t is given by h(t)= -16t^2 + 400.
Height from which it is dropped = 400 ft
When it touches the ground h(t) =0

-16t^2+400=0
16t^2=400
t^2=25
t=5 seconds